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Articles 1 - 7 of 7
Full-Text Articles in Physical Sciences and Mathematics
The Relationship Between Biofouling Adhesion And Frequency Of Mechanical Cleaning To Control The Recruitment To Clear Coatings, Dylan Thomas Eggers
The Relationship Between Biofouling Adhesion And Frequency Of Mechanical Cleaning To Control The Recruitment To Clear Coatings, Dylan Thomas Eggers
Theses and Dissertations
There is a need to control biofouling on sensors and transparent windows in the marine environment. Clear silicone coatings offer a method to reduce the adhesion strength of marine organisms to the surface, however, these also require mechanical cleaning to maintain the surfaces free of fouling. This research evaluated the performance of eighty seven formulations and took the top two candidates to investigate a) the frequencies of wiping required by a brush to maintain two coatings and uncoated glass surfaces free of fouling and b) the effects of clear silicone coatings fouling release properties on required frequencies. The panels were …
Understanding The Spatio-Temporal Evolution Of Surface Heat Flux In The Tropics From Observations And Models, Xin Zhou
Theses and Dissertations
An important component of the earth’s surface energy budget is the surface heat flux that allows the exchange of mass and energy between the ocean and the atmosphere and thereby influences oceanic and atmospheric circulations. For better prediction of weather and climate, numerical models must be able to capture the mean and variability of surface heat flux since surface heat flux directly feeds into model simulation of convection and precipitation. In this study, we explore the spatial and temporal variations of different surface heat flux components over the tropical oceans using observations and atmospheric global climate models (AGCMs). We confine …
Role Of Topography And Land-Sea Contrast On Precipitation In The Maritime Continent During Madden-Julian Oscillation Propagation, Haochen Tan
Theses and Dissertations
The Maritime Continent (MC) is the largest archipelago located between the Indian and western Pacific Oceans. The MC is surrounded by warm seas surface temperatures that leads to deep convection, which is also modulated by the land and its topography. The latent heat release due to condensation in the MC plays a significant role in modulating the global atmospheric circulation. The MC precipitation is also influenced by large-scale atmospheric variability such as the Madden-Julian Oscillation (MJO) which in turn is modulated by the MJO. In the recent past, the MC has gotten more attention due to a number of field …
An Estimation Of Light Attenuation In A Shallow Estuary Using In-Situ Observations And Multispectral Satellite Imagery, Samin Taosif Aziz
An Estimation Of Light Attenuation In A Shallow Estuary Using In-Situ Observations And Multispectral Satellite Imagery, Samin Taosif Aziz
Theses and Dissertations
A methodology is used to predict the underwater light field using data from the WorldView-3 (WV-3) multispectral satellite sensor. WV-3 multispectral imagery is analyzed to estimate reflectance above the water surface, followed by application of empirical algorithms at different water depth locations to estimate light attenuation and penetration depths in shallow water. This approach uses (a) full bit resolution WV-3 imagery, (b) top of atmosphere spectral radiance to estimate reflectance at the sensor and (c) atmospheric corrections to estimate water surface reflectance just above the water. After the water reflectance is obtained, it is used to correct for water surface …
Wind-Driven Setup, Roughness, And Drag Over A Depth- And Fetch-Limited Coastal Estuary, Jeffrey Allen Colvin
Wind-Driven Setup, Roughness, And Drag Over A Depth- And Fetch-Limited Coastal Estuary, Jeffrey Allen Colvin
Theses and Dissertations
The understanding of the momentum exchange across the air-sea interface is critical to accurately model and forecast wind speed, wave properties, setup, and circulation. This is particularly true for a restricted estuary, such as the Indian River Lagoon (IRL), where wind is the driving force behind water movement due to the limited number of direct ocean connections. Current atmospheric and hydrodynamic models use formulations of the drag coefficient and/or roughness length based on open ocean studies in which wave properties are not considered. This dissertation develops two parameterizations – one for wind setup and one for the drag coefficient – …
Evaluating Ensemble Wind Downscaling Methodologies Over A Coastal Estuary, Bryan Paul Holman
Evaluating Ensemble Wind Downscaling Methodologies Over A Coastal Estuary, Bryan Paul Holman
Theses and Dissertations
Current numerical weather prediction (NWP) ensemble systems are biased and under dispersive. While statistical methods have been developed to correct for these errors, the resulting post processed forecasts are typically available at observing stations only. Yet post processed forecasts are needed everywhere. Additionally, the horizontal grid spacing of current ensemble systems is too coarse to resolve the Indian River Lagoon (IRL), a coastal estuary in central Florida that impacts the local wind climatology. Thus, computationally reasonable approaches are needed that simultaneously downscale and post process ensemble wind forecasts. Currently no approach exists to do this, particularly in coastal areas such …
Chemical Forms Of Nitrogen In Runoff From Diverse Florida Watersheds, Jessica Emily Voelker
Chemical Forms Of Nitrogen In Runoff From Diverse Florida Watersheds, Jessica Emily Voelker
Theses and Dissertations
Watershed use along the Indian River Lagoon (IRL) on the central east coast of Florida has changed drastically during the past century, bringing with it declining water quality, eutrophication, hypoxia and fish kills. The decline of the lagoon has been directly linked to nutrient overloading; however, the sources and chemical forms of nutrients to the IRL are still not well constrained. This study was designed to determine how watershed land use impacts concentrations and fluxes of the various forms of dissolved nitrogen to the IRL. Five tributaries to the IRL were sampled monthly from July 2015 – September 2016. Storm …